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Ln(III) complexes with triptycene based tripodal ligands: speciation and equilibria

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Abstract

Triaminotriptycene was used as a rigid anchoring platform for preparing several organic ligands for Ln(III) complexation. In this work we present detailed speciation studies with a tripodal ligand L6 possessing terminal carboxamide coordinating moieties. The solution speciation for different [Ln]/[L] ratios is investigated using NMR and mass spectrometry and compared with those of closely related ligands L7 and L8. A special interest is devoted to chemical equilibria in metal excess, whereby different complex species are generated through slow transformations. The effect of the ionic radius along the lanthanide series is discussed for tetranuclear and trinuclear complexes.

Graphical abstract: Ln(iii) complexes with triptycene based tripodal ligands: speciation and equilibria

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Publication details

The article was received on 16 Jan 2018, accepted on 14 Mar 2018 and first published on 14 Mar 2018


Article type: Paper
DOI: 10.1039/C8NJ00252E
Citation: New J. Chem., 2018, Advance Article
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    Ln(III) complexes with triptycene based tripodal ligands: speciation and equilibria

    J. Hamacek, A. Vuillamy, L. Peterhans, A. Homberg, D. Poggiali, M. W. Schneider and M. Mastalerz, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ00252E

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